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Welcome to Henan San Kuang Machinery Technology Co., Ltd. — your trusted partner in precision motion control components since 2014. Our Servo Coupling 440C Steel Helical Type is engineered to deliver high torque transmission at speeds up to 8000 RPM, making it an ideal choice for demanding CNC spindle drive applications. Crafted from premium 440C stainless steel, this helical coupling offers excellent corrosion resistance, rigidity, and long service life. Whether you need to connect servo motors to ball screws or spindles, our coupling ensures zero backlash and high torsional stiffness for reliable performance in automated machinery.
Key Features & Technical Specifications
- Material: High-quality 440C stainless steel, heat-treated for hardness and wear resistance.
- Helical Slit Design: Single-piece construction with helical cuts that provide flexibility, compensate for angular, parallel, and axial misalignments, and eliminate backlash.
- Torque Capacity: Rated torque of 80 Nm, with a higher maximum torque for peak loads.
- Speed Rating: Designed for continuous operation up to 8000 RPM, suitable for high-speed spindles.
- Zero Backlash: Helical design ensures precise motion transfer without lost motion.
- Low Inertia: Optimized for dynamic servo applications to reduce system energy consumption.
- Customizable Bore Sizes: Available in inch or metric bores, with keyways or clamping options per your specs.
- Balanced for High Speed: Precision balanced options available for vibration-free operation at high RPM.
| Parameter | Value |
|---|---|
| Rated Torque | 80 Nm |
| Maximum Speed | 8000 RPM |
| Material | 440C Stainless Steel |
| Misalignment Compensation | Angular: ≤1°, Parallel: ≤0.2 mm, Axial: ≤0.5 mm (typical) |
| Operating Temperature | -30°C to +120°C |
| Finish | Natural / Passivated (optional) |
Benefits for Your Application
- Enhanced Machine Accuracy: Zero-backlash design ensures precise position control for CNC machining.
- Reduced Downtime: 440C steel resists wear and corrosion, extending coupling life in harsh environments.
- Simplified Installation: One-piece helical structure eliminates the need for multiple parts and reduces assembly time.
- Cost-Effective Performance: High torque capacity at a competitive price compared to bellows or disc couplings.
- Versatile Integration: Works seamlessly with servo motors, steppers, and spindle drives.
Why Choose Henan San Kuang Machinery Technology Co., Ltd.?
Established in 2014 with a factory spanning 10,000–30,000 square meters, we employ 51–100 skilled professionals and achieve an annual export value of US$2.5–5 million. Our products are shipped from major Chinese ports including Shanghai, Qingdao, and Tianjin to markets across North America, Europe, Southeast Asia, and beyond. Our quality management system adheres to multiple recognized standards such as ISO9001, ISO14000, and OHSAS18001, reflecting our commitment to consistent quality and environmental responsibility. Every coupling undergoes rigorous dimensional and performance inspection before shipment. With over a decade of experience in motion control components, we provide customized bore sizes, keyways, and balancing services to meet your specific spindle drive requirements. Contact us today for a quote or technical consultation — let our precision components drive your success.
Frequently Asked Questions
-
Q1: Can this coupling handle intermittent peak loads beyond 80 Nm?
Yes, the maximum torque (fracture torque) is typically 2–3 times the rated torque. However, continuous operation should stay within the rated 80 Nm to ensure longevity. -
Q2: What bore sizes are available?
We offer standard bores from 6 mm to 35 mm or inch equivalents. Custom bores up to 40 mm can be produced upon request. -
Q3: Is the coupling suitable for vertical shaft applications?
Yes, the helical design does not depend on friction or clamping alone; it can be used in vertical orientations with proper retention. -
Q4: Does the 440C steel require special lubrication?
No lubrication is needed. The coupling is maintenance-free under normal operating conditions. -
Q5: Can you provide dynamic balancing for high-speed use?
Yes, optional dynamic balancing to G2.5 grade is available for speeds exceeding 6000 RPM. -
Q6: What is the typical lead time?
For standard sizes, lead time is 7–15 working days. Custom orders may take 15–25 working days depending on complexity. -
Q7: Do you offer keyways or clamping hubs?
Yes, we can produce keyways according to DIN or JIS standards, or split clamping hubs for easy installation. -
Q8: How do I ensure the coupling fits my servo motor shaft and spindle?
Provide us with your shaft diameters, tolerance class, and application details. We will recommend the appropriate bore size and configuration.
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